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Increase the range of MRI systems, RF amplifier design, and custom antenna design


Two experts specialized in developing MRI antennas

  • Alexandru Foias, M.Sc., Biomedical Engineering
  • Nibardo Lopez Rios, Ph.D., Electrical Engineering


A magnetic resonance imaging (MRI) system requires antennas to transmit and receive the radio frequency (RF) signal. RF lab helps conceive, design and manufacture custom-made MRI antennas that maximize the signal-to-noise ratio (SNR).

  • Custom antenna design services (RF simulations and mechanical design under Autocad) and antenna construction (including implementation and testing of SNR in MRI systems) for various magnetic field strengths (3T, 7T) and manufacturers (Siemens, General Electric, Varian)
  • In situ tests on 3T and 7T MRI systems
  • RF Simulation (FEKO, CST) and Circuit Design (Altium Designer)
  • Network analysis that can even be transported to the imaging site for in situ reflection/transmission parameters measurements (FieldFox, Agilent) to characterize the antennas in the magnetic environment (in the magnet, gradients, etc.)
  • 3D printing on wide print field (20.5 × 21.5 × 60 cm)


  • Network analyzer
    • E5061B (100kHz-3GHz, full two-port S-parameters)
    • FieldFox N9923A (portable, shielded, full two-port S-parameters)
  • 3D printer
    • Builder Premium Large Red (dual-feed build size 205 x 215 x 600 mm)
    • Modix Big-60 V2 ( dual-feed build size 600 × 600 × 600 mm)
  • MRI
    • On site: Siemens 3T Skyra
    • Off site: 3T (Siemens, GE, Philips) and 7T (Agilent, Bruker) systems


Julien Cohen-Adad, Ph.D., Eng.
Associate Professor, Departement of Electrical Engineering, Polytechnique Montréal/IUGM (Expert MRI/antennas); Chairholder of Canada Research Chair in Quantitative Magnetic Resonance Imaging; Website


Contact Julien Cohen-Adad

  • For TransMedTech members: The use of the platform (network analyzer, 3D printer, etc.) is free. One-hour training may be required to ensure that the use of the equipment is in accordance with the correct procedures.
  • For external members: Occasional use, such as taking a few measurements on the network analyzer, is free to promote collaborations. If larger services are requested, such as antenna construction, 3D printing or consultation, a service agreement including material and expertise fees will be proposed.